If you wish to purchase the right to make copies of this paper for distribution to others, please select the quantity.

Quantity:

Total Price =

You will receive a perfect bound, 8.5 x 11 inch, black and white printed copy of this PDF document with a glossy color cover. Currently shipping to U.S. addresses only. Your order will ship within 3 business days. For more details, view our FAQ.

Quantity:Total Price = $9.99 plus shipping (U.S. Only)

If you have any problems with this purchase, please contact us for assistance by email: Support@SSRN.com or by phone: 877-SSRNHelp (877 777 6435) in the United States, or +1 585 442 8170 outside of the United States. We are open Monday through Friday between the hours of 8:30AM and 6:00PM, United States Eastern.

When asked to name one proposition in the social sciences that is both true and non-trivial, Paul Samuelson famously replied: `Ricardo's theory of comparative advantage'. Truth, however, in Samuelson's reply refers to the fact that Ricardo's theory of comparative advantage is mathematically correct, not that it is empirically valid. The goal of this paper is to assess the empirical performance of Ricardo's ideas. We use novel agricultural data that describe the productivity in 17 crops of 1.6 million parcels of land in 55 countries around the world. Crucially, this dataset contains information about the productivity of each parcel of land in all crops, not just those that are currently being grown. This direct information about relative productivity differences across economic activities allows us to compute, for the first time, the output predicted by Ricardo's theory of comparative advantage. Despite all of the real-world considerations from which this theory abstracts, we find that Ricardo's theory of comparative advantage has significant explanatory power in the data, at least within the scope of our analysis.